1 Examples of viral infections include, mumps or hepatitis B. 2  Some autoimmune conditions-such as lupus, or Sjogren's syndrome. 3  Injury to the pancreas. 4  Idiopathic-about 15% of all cases of acute pancreatitis are termed idiopathic pancreatitis.
For instance, in America, these kinds of drums are referred to as the doumbek. They are widely used in E. Europe, N. Africa and a larger part of Asia. Good examples of these kinds of drums include the Bendir, Riq, Tamburine, Irish bodhran etc. These drums are mostly made of wood which forms almost a perfect circle.
The traditional drum kit consists of a mix of drums (classified as classically as membranophones, Hornbostel-Sachs high-level classification 2) and idiophones (Hornbostel-Sachs high-level classification 1, most significantly cymbals but also including the woodblock and cowbell for example). The snare drum often does not match the kit, for example being a metal or plain wood shell in a kit where the other drums are in a matching finish. 2  Drummers tend to spend more time playing the snare and cymbals than the other drums. 3  Thin and/or bell-metal cymbals are easily broken by poor technique.